Spark plug wear...
 

So on Sunday I was inspecting my spark plugs, 3 of them had normal brownish color on the tip, the 4th was pretty clean on the tip, as you can see in the pics... why is that? Seems like that one isnt getting used much or what? Car drives fine, good power... help. Thanks.
Both pics are of the clean plug.

http://i2.photobucket.com/albums/y37...ari/C01622.jpg

http://i2.photobucket.com/albums/y37...ari/C01619.jpg

Bad coil? or wire? Or plug? Is there vacuum leak to it?

Not normal in a bad way. All four should look about the same.

Could be a bad wire .. shouldn't be a bad coil. If the coil was bad, then another plug should look similar and your car would drive like absolute ass!!

^yeah, i thought that as well. When i had a Very Clean plug - it was a vacuum leak at the manifold.

It could simply be nothing. I'm a Saturn/SAAB technician and change plugs pretty much daily. I know the 2.2l Ecotec motor found in almost all Saturns (and SAABs for that matter) wear plugs out at different rates. Whenever I do a tune-up, I always pull plugs 2 and 4 first to check them because I know they wear out faster than 1 and 3. If plugs 2 and 4 are fine then there's not much point pulling 1 and 3. Your spark plugs look in pretty good condition so I'm guessing they have low mileage on them and they won't show too much. Once they are worn, you'll find they aren't all worn out the same. This is normal.